Air purification unit



FIG. 1 is a front perspective view of an air purification unit showingour new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a right side elevation view thereof, the left side being amirror image of that shown.

The ornamental design for an air purification unit, as shown anddescribed.